Borehole trajectory tracking short section damping device

Abstract

The invention relates to a borehole trajectory tracking short section damping device used in the field of horizontal well drilling. According to the technical scheme, the device consists of a pressure-resistant wall, a top sealing cover, a pentagonal hole cylinder, a passive variable damping rubber air bag damper, quartz accelerometers, a gyroscope and a main controller; the pentagonal hole cylinder is arranged in a short section; the passive variable damping rubber air bag damper with the main controller, the gyroscope and three groups of accelerometers is respectively arranged in five rectangular holes; the main controller, the gyroscope and the three groups of accelerometers are arranged in the radial direction; and the passive variable damping rubber air bag damper consists of a semi-cylindrical rubber air bag, a thin rubber pipe and a rubber film. According to the damping device, damping of the rubber air bag is effectively adjusted through flowing of air, the better damping effect is achieved while the safety of the rubber air bag is improved, the structure is simple, installation is easy, and the damping capacity of the short section is greatly improved.

Description

technical field [0001] The invention relates to a sub-joint shock absorbing device for wellbore trajectory tracking, which is a sub-joint device that uses radially arranged sub-joint components and passive variable damping rubber airbag shock absorbers to realize shock absorption for the device, and is used for water Flat well drilling field. Background technique [0002] With the development of science and technology, the accuracy requirements for borehole trajectory tracking are also gradually increasing, so the integrated navigation device that integrates sensors such as accelerometers, magnetometers, radars, and gyroscopes is used more and more frequently in borehole trajectory tracking subsections. At present, the damping method of short joints at home and abroad is usually to arrange the sensor in the axial direction, and install a single rubber buffer in the axial direction of the short joint for shock absorption. However, in actual construction, because the short joi...

AI Technical Summary

Problems solved by technology

At present, the damping method of short joints at home and abroad is usually to arrange the sensor in the axial direction, and install a single rubber buffer in the axial direction of the short joint for shock absorption. However, in actual construction, because the short joint is close to the drill bit, Therefore, the pup joints exist in the environment of high temperature, strong vibration, and large impact for a long time. In the case of strong vibration and large impact, the axial arrangement will make the rubber buffer bear excessive pressure, which may cause the rubber buffer to lose Due to the shock absorption effect, the accuracy of the measurement data of the sensor will decrease, and it is more likely to cause damage to the sensor. Once the sensor fails, it must be tripped again and the instrument will be sent back to the manufacturer for maintenance. Therefore, every time the damage will bring a lot of losses to the construction party.

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